Table 1.

Organization of the fingerprint database.

Reference Points	$\mathit{X}$	$\mathit{Y}$	$\mathit{R}\mathit{S}\mathit{S}\mathit{I}$	$\mathit{M}\mathit{A}\mathit{C}$	Floor
$A_{t1}$	$X_{t1}$	$Y_{t1}$	$\left\{R_{t11},R_{t12},\dots ,R_{t1m}\right\}$	$\left\{M_{t11},M_{t12},\dots ,M_{t1m}\right\}$	$F_t$
$A_{t2}$	$X_{t2}$	$Y_{t1}$	$\left\{R_{t21},R_{t22},\dots ,R_{t2m}\right\}$	$\left\{M_{t21},M_{t22},\dots ,M_{t2m}\right\}$	$F_t$
$\cdots \cdots$	$\cdots \cdots$	$\cdots \cdots$	$\cdots \cdots$	$\cdots \cdots$	$\cdots \cdots$
$A_{ti}$	$X_{ti}$	$Y_{ti}$	$\left\{R_{ti1},R_{ti2},\dots ,R_{tim}\right\}$	$\left\{M_{ti1},M_{ti2},\dots ,M_{tim}\right\}$	$F_t$

where $A_{ti}$ represents the ID of the reference point $i$ on the floor $F_t$; $X_{ti}, Y_{ti}$ denote the coordinates of reference point $A_{ti}$; $R_{tij}$ and $M_{tij}$ denote respectively the top $m$ of RSSIs and corresponding MAC addresses received by reference point $A_{ti}$; $j$ ranges from 1 to $m$ with the maximum of 10, that is to say, $m$ is 10; $F_t$ is the floor number.